How do we explain the vegans and the vegetarians who still get plenty of heart disease? If veganism were a silver bullet, I'd be the first one to jump on that bandwagon, today.
As a meat-eater I think the most stupid strawmen vegans hit me with is the belief that I only eat meat. I think very few people advocate "only eating meat" (e.g. recent 0carb hype, which I think is clearly pseudoscience). You can still eat plants but supplement your diet with meat to get more protein and healthy fats. You can still get 75% of your calories from plants but still eat meat. Also, there will be a huge difference between highly processed meat (bacon, salami etc) and unprocessed, grass-fed meat. Studies like this simply ignore all these factors.